ADS7861EB datasheet by Texas Instruments

ADS7861EB Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the ADS7861EB?
  The recommended power-up sequence is to apply VDD (analog supply) first, followed by VCC (digital supply) and then the clock signal. This ensures proper initialization of the device.
• How do I optimize the analog input impedance for the ADS7861EB?
  To optimize the analog input impedance, use a low-impedance source, such as a buffer amplifier, and keep the input traces as short as possible. Additionally, use a capacitor (e.g., 10nF) in parallel with the input resistor to filter out high-frequency noise.
• What is the maximum sampling rate for the ADS7861EB?
  The maximum sampling rate for the ADS7861EB is 250 kSPS (kilosamples per second) for 12-bit mode and 500 kSPS for 10-bit mode.
• How do I handle the SDO (serial data out) pin when not using the SPI interface?
  When not using the SPI interface, the SDO pin should be left unconnected or tied to a high-impedance state to prevent unwanted data transmission.
• What is the purpose of the REFBUF pin on the ADS7861EB?
  The REFBUF pin is an output pin that provides a buffered reference voltage (VREF) for external circuitry. It can be used to drive external components, such as a voltage reference or an analog-to-digital converter.